
Maple tree along Mary Jane Falls Trail |
General: Rocky Mountain Maple (Acer glabrum var. diffusum) is a modest tree of damp places in the mountains. The leaves are palmate with three lobes, and each lobed is is slightly notched. Young stems are red; older are gray. Seeds are produced with wings that catch the wind.
Rocky Mountain Maples are found along washes, rivers, and other damp areas in the Upper Sonoran (Pinyon-Juniper Woodland), Transition (Yellow Pine Forest), and Canadian
(Pine-Fir Forest) life zones.
Around Las Vegas, Rocky Mountain Maple can most easily be found in moist canyons on Mt. Charleston and other places in the Spring Mountains. |

Typical tree: upright, but sprawling and unkempt
|
Family: Maple (Aceraceae).
Other Names:
Plant Form: Upright to scraggly, branching shrub to tree.
Height: 6 to 20 ft. |
 |
Trunk: silver-gray
Leaves: Palmately lobed with 3 leaflets (leaflets not deeply notched), to about 2-inches wide. Teeth on margin few and blunt
Flowers: Blooms during the spring. Flowers not showy.
Seeds: Seeds hang from small branchlets; each seed has a wing (sumara) that catches in the wind. |

Leaves and twigs
|
Distribution: California, Nevada, Utah, and Arizona.
Habitat: Moist canyons, springs.
Elevation: About 5,000 to 9,000 feet.
Comments: |
 |
Mature (gray) stems and leaves |
 |
Mature (gray) stems and leaves |
 |
Young (red) stems and leaves |
 |
Young (red) stems and leaves |

|
Dorsal surface: compound leaf with three leaflets |
 |
Dorsal surface: compound leaf with three leaflets |
 |
Leaves and developing fruit (bi-winged sumara) |
 |
Leaves and developing fruit (bi-winged sumara) |
 |
Leaves and developing fruit (bi-winged sumara) |
 |
Deformed fruit (bi-winged sumara) |
 |
Deformed fruit (bi-winged sumara) |
 |
Fruit (bi-winged sumara) and leaves |
 |
Tree during winter: leaves have fallen |
 |
Winter leaf still holding on |
 |
Winter fruit still holding on |